My Utricularia nelumbifolia flowered about 3 months ago. I tried self pollinating the flowers, and the plant easily gave me hundreds of seeds. So, I had a lot of material to do some testing on.
I planted most of the seeds on 3 different soil mixtures:
1) 1/1/1/1 Live Sphagnum, peat, perlite and fine orchid bark (Top left)
2) Live Sphagnum (Lower left)
3) 1/1 Peat and sand (Lower right)
As you can see, the airier the mixture is, the better the seedlings seem to grow!
1) Has the most healthy looking plants, and the first "runner stolons" are already growing. The plants also show the largest leaves, and oddly, the leaves also seem much healthier, showing darker colors and stiffier structure.
2) Loses to the mega mix quite a bit, as the leaves are about 1/3 smaller, and seem much more yellow than the leaves of the first pot. No runners so far. Might be because the sphagnum overgrows the older leaves, and thus the plants aren't photosynthesizing as well as the plants in the first pot.
3) The loser pot with the smallest plants. The mixture is just too stuffy, as the stolons seem to just circle on the surface instead of sinking in the soil.
Oh, and no adult "cup" leaves so far in any of the pots.
On the other hand. U.reniformis grows well on peat & sand.
Edited by Sebulon, 24 June 2011 - 08:03 AM.